Mada za sehemu hiiClassification Of Living ThingsMada 1
- Kingdom Animalia
The Kingdom Animalia is one of the largest and most diverse kingdoms in biology. It includes a wide variety of animals that differ significantly in their structure, morphology, and bodily functions.
- Multicellularity — Animals are made up of many cells, and each cell is enclosed within a plasma membrane.
- Tissue differentiation — Animal bodies are organized into tissues, which carry out specific functions.
- Heterotrophic mode of nutrition — Animals are heterotrophs, meaning they depend on other organisms for food.
- Locomotion — Most animals have the ability to move from one place to another at some point in their life cycle.
- Nervous system — Animals have a nervous system, which helps them respond to stimuli in their environment.
Animals are broadly classified into two major groups based on the presence or absence of a notochord.
Notochord
A notochord is a flexible, rod-like structure located along the dorsal side (back) of the animal. It provides support and may either persist throughout the animal's life or be replaced by a backbone (vertebral column) in more advanced animals.
- Chordates
- Animals that possess a notochord at some stage of their development.
- Belong to the Phylum Chordata.
- Non-Chordates
- Animals that do not have a notochord at any stage.
- Comprise many different phyla, making this group more diverse.
| Classification | Presence of Notochord | Example Phylum |
|---|---|---|
| Chordates | Present | Chordata |
| Non-Chordates | Absent | Arthropoda, Mollusca, Annelida, etc. |
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